Improvement in machines for molding chair-bottoms



.IOIIN LENIMAN, for CINCINNATI, OHIO.

Letters Patent No. 110,981, dated January 1-7; 1871.

M- IMPROVEMENT IN MYACHINES FOR MOLDING CHAIR-BOTTOMS.

The Schedule referred to in these Letters atent and making parl: of theSame.

[o all whom 'it may concern.-

Be it' known that I, JOHN LEMMAN, of Cincinnati, Hamilton county, Stateof Ohio, have invented a certain new and useful Improvement in Machinesfor Molding Chair-Bottoms, 85o.; and I do hereby declare the followingto be a sufficiently full, clear, and exact description thereof toenable one skilled in the art to which my invention appertains to makeand use it, reference being had to the accompanying drawing making partof this specification.

Nature and Objects of Intention..

My invention consistsof a chair-bottom moldingmachine, in which the workorstulf to be cut, and the pat-tern or forni receive a simultaneousreciprocating motion under a.`cuttc1yoke, the cutter-end of which yoketraverses the work, the opposite end, at the 'same time, ridingtlicform, while the yoke is fed laterally across the reciprocating formand work.

The object of my invention is to provide a cheap and rapidly-opcratingAinachinc for performing" the work of Yshaping.; chair-bottoms, which hasheretofore been done entirely by hand.

Description of tho .Accompanying Drawing. Figure 1 is a perspective viewof a machine enihodying my invention.

Figure 2 is a sido elevation of the same.

General Description.

A is the frame ofthe machine.

.The central post A supports a feeding-screw, B, which carries thecutter-yoke C.

A wheel or handle, D, is attached to the screw, to enable the operatorto feed the yoke across the work.

Slides E E are fitted to the frame A, upon which the platform F moves. Y

The lower part 'of this plat-form carries the work or stuff to be cut,which is secured'betwecn the tightening-jaws G G', and the upper partcarries the pattern or form H.

The platform F receives a reciprocating motion by connection with thecrank I through pitman J.

The end c of the yoke C carries a chasing-block, a.,

which rides over the foi-m H, and the endv o' carries the cutterb,'whicl1 is so constructed that when revolving it describes a sphereequal in size to thc chaser a,

and thus the cutter is compelled .to sha-pe the work in accordance withthe form traversed by the chascr o.

The cutter b is operated by the belt K from pulley L, which is securedto the driving-shaft M.

The crank I is operated by this same drivingshaft, through .the mediumof a belt, N, pulley O, shaft I), beltQ, and pulley It. i

An ordinary clutch-coupling is attached between this pulley It and thecrank-plate I, to enable the operator to stop thc platform F to removefinished chairbottoms and attach new stuff.

- @poration When the stuff to be cut is secured to the lower part of theplatform Fin the manner shown, the clutch upon the shaft of thecrank-plate is thrown in, so as to set the platform in motion, andthecutter-yoke is then fed across the work by means of'the screw B, uponwhich the yoke swivels, and the hand-wheel or crank D.`

. When the cutter 'has traversed the width of the` work once thechair-bottom is completed, as the chas l er a, by means of thecombined-movement of thc'plat-- form and cutter-yoke has traversed everypart of thc forni or pattern -H and caused a corresponding shape to begiven to the work below.

Claim..

- 'In combination. with thel reciprocatingplatform F F. carrying a. xedfpattern, H, and the work to be cut, the swinging-yokc C a b, whenconstructed to swivel upon a single spindle, B, and to feed across thereciprocating form and work, as and for the pur pose set forth.

p In testimony of which invention I havekhcreunto set my hand.

JOHN LEMMAN.

Witnesses:

'FRANK MILLwnIiD, J. L. WARTMANN.

